Sturdy Balloon Fast Pump Hand Held, Inflator Air Pump for Balloons, 2 Way Dual Action. our balloon inflators pump air both on the up- and the downstroke allowing your balloons to inflate twice as fast. unlike other cheap and flimsy manual balloon pumps we encountered out there, our handheld balloon pumps have a solid and durable construction that is guaranteed to last for a long time to come. No power supply, suitable for families to work together by hand to cultivate children's hands-on ability